[suicideneil]

I think given the age of the gear, a new esc & batts is in order....

For an esc, you want to be looking at the MambaMonster, nothing smaller, or the Tekin RX8 ( or for a cheaper option the HobbyWing XErun 150amp model ). For batts, go lipo- a pair of 2s ~5000mah 30-50C packs will work very nicely. Nimhs just won't cut it unless you are happy with pedestrian speed and punch.

For more info, click my sig for the Emaxx guides and Tutorials pages...